Electric motor control system



L. A. CARVER ELECTRIC MOTOR CONTROL SYSTEM Sept. 1, 1931.

Original Filed Aug. 21 1925 gwntot attoz "up Patented Sept. 1 1931 UNITEDSTATES PATENT OFFICE LEO .A. CARVER, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, THE PARAMOUNT FIRE ALARM ENGINEERING COMPANY, OF CLEVELAND, OHIO, A

ELECTRIC MOTOR CONTROL SYSTEM Original application filed August 21, 1926, Serial No. 130,604. Divided and this 1927. Serial No. 184,320.-

@No'. 130,604, filed August 21, 1926.

brought together by rotation of The principal object of the present improvement is to provide suitable time controlled mechanism for intermittently reciprocating the box or boxes carrying colored lenses of one or agroup of traflic signals described in my copending application, Serial No. 130,604, filed August 21, 1926, and for synchronizing the operation of such a group of traific signals.

An embodiment of the invention is illustrated in the accompanying drawing in which is shown a wiring diagram disclosing the means of connecting a plurality of sig nals in series.

Similar numerals refer throughout the drawing.

In the figure is shown a wiring diagram of the electric circuits for connectin in parallel each of the motors of a series oi the signals arranged to operate in synchronism. To operate all of the series of signals in synchronism an automatic switch is located to similar parts in the series and mounted in any suitable place, such as upon the support of one of the boxes in the series. This switch comprises the magnet 60 and the armature 61 provided with a contact 62 arranged to engage the fixed contact 64:.

The line wire 33a is connected with one sideof the magnet 60 and with the armature 61 respectively, the wire 33 being then con.- tinued through all of the signal devices in the series, being connected to one side of each lamp 8, as at 65, and toone side of each motor 31, as at 66, and the wire 33a also leads through all of the signal devices in the series, being connected to the other side of each lamp 8, as shown at 67, and to each spring contact finger of a pair of spring contact fingers 55 and 56 adapted to be the respective disks 54, as shown at 68.

A wire 69 leads from the magnet 60, of the,

automatic controlling switch, through each of the signal devices in the series, being con- .thus causing all motors nected, as by tact 71 of each signal, arranged to be engaged'by the spring switch blade 59.

A similar wire 72 leads from the fixed contact 64 of the automatic controlling switch through each of the signals in the series, being connected, as by the wire 73, with the fixed contact 74: in each signal, arranged to be alternately engaged by the spring switch blades 59which is actuated by the cam 58 on the cam disk 37. A wire 75 connects the switch blade 59, of each signal device, with the motor 31 of the device.

A wire 7 6 connects the line wire 33 with one side of the amber lamp 30 and one side of the bell magnet 53 operating the bell 52, in each signal device. The other side of the amber lamp is connected to the spring contact finger 56, by a wire 77, a wire 78 connecting the other" side of the bell magnet 53 with said spring finger. For the purpose of independently cutting out the amber light and the bell in each signal device, manually have reached that position; the last cam opening the energized side of the circuit causing the magnet coil to become deenergized, releasing the spring armature 61 and closing the circuit on the opposite side, starting all of the motors.

All motors will now run until the high points of the cams are all carried over the spring switch blades 59 and when that point is passed the contacts will close on the other side, causing the magnet coil 60 to be energized again-to furnish current until all the cams have again reached the high point, to be synchronized at each revolution of the cams.

It will be seen that the present improved application filed April 16,

a wire 70, with the fixed contime controlled mechanism for synchronous- 1y operating a group of traflic signals is simple and inexpensive. as compared with the intricate switch mechanismrequired to operate the traffic signals in common use, and possesses many advantages oyer the latter.

I claim:

1-. A motor control system for signals and the like including a circuit, a plurality of motors connected in parallel in the circuit, means controlled by the operation of each motor-for opening the circuit to said motor at a predetermined time, and means operated by the opening of the last motor circuit tobe opened for simultaneously closing the circuit to all. of. the motors.

2. A motor control system for signals an the like including a circuit, a plurality of motors connected in parallel in the circuit, means controlled by the operation of each at a predetermined time, and a magnet operated by the opening of the last motor cir-' cuit to be opened for simultaneously closing the circuit to all of the motors.

3. Amotor control system for signals and the like including a circuit, a plurality of motors connected in parallel in the circuit, means controlled by the operation ofeach motor for opening the circuit to said motor at a predetermined time, and a magnet "connected in series in the circuit operated by the opening of the last motor circuit to be 1 motor for opening the circuit to said motor P opened for simultaneously closing the circuit to all of the motors.

4. A motor control system for signals and the likeincluding a circuit, a plurality of motors connected in parallel in the circuit,.

cam means controlled by the operation of each motor for opening the circuit to said motor at a predetermined time, and means operated by the opening of the last motor circuit to be opened for simultaneously clos- I hereunto subscribed ing the circuit to allof the motors.

5. A motor control system for signals and the like including a circuit, a plurality of motors connected in parallel in the circuit, cam means controlled by the \operation of each motor for opening the circuitto said motor at a 'predetermined time, and a magnet operatedby the opening of the last motor circuit to be opened for simultaneously ed by the opening of the last motor circuit "to be-opened for simultaneously closing thecircuit to all of the motors.

In-testimony that I claim in name.

E0 A. CARVER,

the above I have 

